Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/test/fixedbugs/issue16760.go b/test/fixedbugs/issue16760.go
new file mode 100644
index 0000000..a7eede4
--- /dev/null
+++ b/test/fixedbugs/issue16760.go
@@ -0,0 +1,42 @@
+// run
+
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Make sure we don't start marshaling (writing to the stack)
+// arguments until those arguments are evaluated and known
+// not to unconditionally panic. If they unconditionally panic,
+// we write some args but never do the call. That messes up
+// the logic which decides how big the argout section needs to be.
+
+package main
+
+type W interface {
+	Write([]byte)
+}
+
+type F func(W)
+
+func foo(f F) {
+	defer func() {
+		if r := recover(); r != nil {
+			usestack(1000)
+		}
+	}()
+	f(nil)
+}
+
+func main() {
+	foo(func(w W) {
+		var x []string
+		w.Write([]byte(x[5]))
+	})
+}
+
+func usestack(n int) {
+	if n == 0 {
+		return
+	}
+	usestack(n - 1)
+}